I'm experiencing this same issue and the "boilerplate" reconnect method isn't fixing the issue.
DCU has now required all customers to change their username to a alphabetic name rather than the member number. QBO is still prompting for a member number when I attempt to reconnect my account. I've tried reconnecting using both the newly established username as well as the old member number with no success.
Please elevate this issue for tech support. Thanks!
